Cool idea! I like the little guys and could definitely see this scaling (pun intended) into a cool full game. I also noticed that once my army got huge, it was getting a little laggy and I got stuck a few times. I really like the balance of having to stand near the fallen soldiers to grow your army, it forces you to not just hide behind your army and get out to the front lines when it's safer. Good job!
Check out my game when you get a chance!